What must you state to properly execute a polar call for fire mission?

To properly execute a polar call for fire mission, the observer location is crucial as it serves as the reference point from which the target is identified and described. In a polar coordinates system, the observer needs to provide their exact location so that the artillery or fire support unit can accurately calculate the direction and distance to the target. This information is essential for ensuring that the munitions are delivered precisely on target while avoiding any risk to friendly forces in the area.

Without stating the observer location, the fire support team would lack the necessary geographical context, making it difficult to determine the right angle and range to engage the target effectively. The observer's position is foundational for the calculation of the target coordinates, and clarity in this area directly influences the success of the mission.